How do you get your ex girlfriend back who you had a long distance relationship with?

I went to a boarding school with all guys and we had a party with an all girls school and I fell in love with one of the girls at that school. However, we had to have a long distance relationship over the summer because I was busy preparing for high school. We continued our relationship for around 3 months and it seemed too hard for both of us to move on, so we broke up. At first she said she wanted to still be my girlfriend, but as time passed she wrote me that she didn't want me anymore and that she moved on. Now I feel terrible and I really want her back, but she doesn't want me to write her. I tried to give her space, and she wanted me to move on as well, but I simply couldn't. She told me that she was physically lonely, and she has a crush on someone else right now. She told me that she still has love for me, but now that she knows my personality she doesn't want us together again. I want to move on as well, but this girl seems to be the only one for me. Is there ANYTHING I could do? I've talked to people about it and a lot of them told me to give up on her and move on, but I can't, and I really want some advice that can give me hope.

say baby come back!

The advice you were already given is sound advice. You have to move on.

When a girl tells you she's done and she does not want any contact with you, you have to respect that, otherwise you start to get close to stalking or harassing her.

THE HOPEFUL PART IS this horrible pain you feel does go away, and there is someone -- no doubt, many someone's -- out there for you. :-)